thumb it in 

When fucking and you get brewers droop or can't manage anything more than a slack-on, one is required to 'thumb it in'
As seen on many porno's

"Fuck me hard Liam", "sorry petlamb, ive gone all soft i'll just have to thumb it in"

thumb it in by Diamond Dave April 28, 2004

Thumbs-it-up 

Its when you give a thumbs-up to a word on urban dictionary.

Guy1: Hey dude go on urban dictionary, go to my word and thumbs-it-up.
Guy2: I'm thumbsing it up now.

Thumbs-it-up by Tiny Doug April 6, 2010

thumb it 

To hitchhike, if you don't have a ride

If you don't like the way I drive, you can thumb it.

thumb it by Pseudonym August 29, 2004

thumb it down a shade 

calm down, take a step back, turn it down a notch.

Hey man thumb it down a shade.

thumb it down a shade by mikehoncho March 27, 2012

thumb it 

when you are too drunk to get a boner so you use your thumb in place of you dick.

1.Evan was too drunk last night so he just decided to thumb it. his girlfriend told him he got bigger. Evan cried himself to sleep...

2. Dude: i was sooo smashed last night i couldn't get it up man.

Man: you should have thumbed it dude!

Dude: f that shit i duffle bagged it instead man.

Man: yeah but knowing your girlfriend it would be like throwing a hot dog down a hallway dude!

Dude: thats low man. (shoots off the mans dick)

thumb it by the new mexican July 26, 2010

thumbin' it 

The act of rolling on the floor in your bathroom while thumbing your asshole. This excludes any time after you have received a blumpkin.

" I saw Devontae through his window thumbin' it yo."

thumbin' it by Harrison Stevens August 29, 2005

thumb it down 

to press a bowl down in order to compress it and burn more of it at the same time.

Hey bro, after you load the bowl, thumb it down so it burns better.

thumb it down by Stephen Potlatch December 2, 2007