When your penis freezes to avoid ejaculation while in the act of sexual intercourse or while buttsecksing.
by Jarryd January 24, 2006
When your penis becomes erect a considerable amount of time after being in a sexual or semi sexual situation
I saw a really hot chick at the bakery, but I had some mad penis lag, and didn't get a boner until I was down the block!
by jfitty359 August 31, 2019