Thumbing it in

Using your thumb to help pleasure a woman cause you can't get it up.

Mart had to much to drink and couldn’t get aroused. So he didn’t disappoint the lady he used his thumb to help get it up there (thumbing it in).

"Like trying to push a Marshmallow into a piggy bank."

"You’ve got it!"

Thumbing it in by scratch_nasty November 2, 2011

thumbing it in slack 

When a man fails to achieve an erection but is undaunted and proceeds to push his penis into the vagina or more commonly anus and attempts sloppy sex by pushing in his penis with his thumb.

Nathan - Aww man im going to jail. imma be some guys bitch. i hope they are tender and start by thumbing it in slack

thumbing it in slack by SGTKM December 1, 2010