Top definition
v. An immediate ejaculation of which you have no control over.
I watched the Jizz in my pants video and they kept instajacking!
by RYANBG August 18, 2009
Mug icon

The Urban Dictionary Mug

One side has the word, one side has the definition. Microwave and dishwasher safe. Lotsa space for your liquids.

Buy the mug