Instachub

When something is so hot that it give you a chubby (partial erection) instantly.

Seeing Jessica Alba in a 2 piece gave me an instachub!

by rMace703 May 06, 2011

Instachub

When a girl posts a hot picture to Instagram bad you become instantly erect.

Daulton: Dude did you see Ashley’s Instagram picture?

Matthew: Oh my god yes it was so hot it gave me an instachub.

by Lover of instachubs May 23, 2018