Definitions by Slamhammer

Mathewasm 

The unbilievable orgasm you get while having sex or while getting Fingered with someone with the name mathew, (Mathewasms may last up to 100 days) is said to me better than all drugs in the world

Girl: I had the Best mathewasm it lasted 74 days!

Mathewasm by Slamhammer November 13, 2010