After lots and lots time consuming research here is a good compiled list.
Mens Gentials
Angry Samoan
Anteater (foreskinned penis)
Arrow
A ss plower
A ss pounder
A ss ripper
Badajo (Spanish)
Baloney
Banana/Platano (Spanish)
Beaver buster
Beaver cleaver
Beef bayonet
Beer can (penis with large girth)
Bell
Bethany M
Bicho (Spanish)
Bicycle
Big Ben
Bipper
Bird
Bishop
Bishop in a turtleneck (uncircumcised penis)
Blinky (My Fellow Americans)
Blue-veined microphone
Blue-veined throbber
Bone
Boner
Boy's best friend
Boycock
Boyhood
Boypleaser
Boypole
Boystick
Bratwurst (Die Mommy Die Reference)
Butoh
Cabbage roll
Captain, the
Captain Picard
Caralho (Portuguese)
Carne (Spanish, Italian: meat)
Cazzo (Italian)
Center pole
Cervix slammer (long penis)
Cigala (Del CATALA)
Chilichute
Chinchin (Japanese)
Chinko (Japanese)
Chinpo (Japanese)
Choad/Chode (penis; sometimes defined as a penis with width greater than length)
Chorra (Spanish)
Chromosome snake
Cipote (Spanish)
Clit tickler
Clyde
C ock
C ock rocket
Colonel
Crank
Cumgun
Cumpole
Cumrod
Cumshooter
Cumstick
C unt buster
C unt poker
C unt pounder
C unt ripper
C unt thumper
Cyclops
Denture cleaner
Devirginator
Diamond Cutter
D ick
Ding-a-ling
Ding-dong
Dingus
Dink
Dipstick
Dirty pillows
Dolk (Danish, actually means "knife")
Dong/Donger
Donkeycock/Donkeydick (very large penis)
Doodle-dandy (from m asturbation)
Doomhammer
Dork
Drill/Driller
Dusty Gazongas
Egg roll
Eiffel Tower
Endowment
Engine clanker
Equipment
Erection
Fatboy Slim
Father Christmas
First Penis, The (The US President's)
Fireman
Flagpole
F uck stick
F ucker
Fur-seeking meat missile
Gherkin
Giggle stick
God
Goober
Guy's best friend
Ham trucheon
Happiness
Haussenfeffer (German)
Heat-seeking missile/Heat Seeking Moisture Missile
Herman the German in a turtleneck
Hog/Hawg
Hoo hoo dilly (South Park reference)
Horsecock/Horsedick (very large penis)
Hose
Impregnator
Jack the Ripper
Jade phoenix
Ji ba (Mandarin)
Jimmer jammer
Jimmy
J izz cannon
Jizzer
John Thomas (term first used in Lady Chatterley's Lover)
Johnson
Jonathan's one-eyed master
Joystick
Junk
Kickstand
Kidney sweeper
Knob
Kutas (Polish)
Lad (Irish)
Lanze (German)
Lap bone
Lap taffy
Leaning Tower of Pisa
Leg wand
Lingum or lingam (from Hindu)
Little Willy
Lizard
Log
Lollipop
Longfellow
Love club
Love loaf
Love length
Love missile
Love muscle
Love Pump
Love Sausage
Love snake
Love stick
Love wand
LUEshi
Luncheon Meat Truncheon
Magic dragon (in reference to the charactor "Elliott" in Pete's Dragon)
Magic stick
Magic wand
Main cable
Main vein
Manhood
Manmeat
Manrod
Manroot
Mantower
Martillo (Spanish: Hammer)
Meat
Meat popsicle
Meat thermometer
Meat whistle
Meat Loaf
Megg's best friend
Member (Spanish: Miembro)
Mickey (chiefly Irish)
Micro Mikey
Middle leg (large penis)
Minchia (Italian)
Mini-Me
Minga (Spanish)
Missile
Monster
Mr. Happy
Needle
(Japanese)
Old fella/Old feller/Old fellow
One-eyed monster/sitting on a beanbag chair
One-eyed snake
One-eyed trouser snake
One-eyed trouser trout
Organ
Oscar ("My Baloney has a first name...")
Panga (Latin American Spanish)
Passion pole
Pecker
Pedro/Peter
Pee-pee
Pee-puette
Pee-wee
Pelir
Pen
Pencil
Pencildick
Percy
Phallus
Phantom Lord of Ultimate Darkness
Piça (Portuguese)
Picha (Portuguese)
Pickle
Pickledick (High School High reference)
Piço (Portuguese)
Pija (Spanish)
Pijo (Spanish)
Pimmel (German)
Pinga (Spanish)
Pink torpedo (Spinal Tap reference)
Pipe
Piperoll (movie "She's Gotta Have It")
Plank
Playboy
Pleasure pole