A teeny tiny penis that you can't do NOTHING with. no orgies with this one ladies.
Marcy: My cousin Jonah has an inchworm. He has had it all the 15 years of his life and it never grows.

Percy: Where did he get that? i once caught a caterpillar and it only lasted a few days. Maybe i pet it too much....it was so cute though... Does Jonah ever pet his inchworm?

Marcy: who ho ho ohhh ya. He pets it ALL the time... but nothing ever happens...Its just too small.

Percy: Really? He has had his inchworm for 15 years, but he never grows and is really tiny?

Marcy: You got that right.
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A man that has a very small penis.
Girl 1: What happened between you and Alex? I thought things were going so well.

Girl 2: well...we were in bed, it was gettin' all hot n' heavy and then I saw it, he was a total inchwormer
by BronxbabyGirl March 06, 2009
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When you fuck the shit out of a greasy pussy girl from behind that her juices spread on the floor making you guys move about the room like a inch worm.
Nick: Yo what the fuck why is the living room floor soaked!
Jared: Sorry I was fucking greasy pussy girl so hard last night we were inchworming around the room.

Nick: Nice! Now clean this shit up!
by Nguy69 October 28, 2017
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A variation of the Manitoba Snowplow, for men with a small penis.
I gave my wife a Minnesota Inchworm last night with my 3 inch penis.
by IAMSMALL June 26, 2018
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A small albanian penis that is about 1 inch flaccid but grows to a mighty inch and a half when aroused.
"I walked in on Adrian in the shower and saw his albanian inchworm in it's prime."
by Ass hair, don't care June 18, 2013
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The shrivelled, atrophied penis of a sick twisted disturbed fuck. All that comes out is a tiny drop of a congealed yellow liquid, created from years of disuse.
Zeke: Why did Lenny just run into his office and close the door?

Clyde: Did he have his mail with him?

Zeke: Yeah.

Clyde: Ah, then it must be time to whip out the ol' purple inchworm for a grueling hour of futile jackin' off.
by Krakky McKraken August 03, 2007
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