Comes from the two words dominating session, downsized to domsesh. It is used in substitution for words like rape, destroy, own, pwn, lolwtfbbqsauce, etc. There are different levels of domsesh depending on the calibur; for example, if you really got this guy mad because you absolutely raped him, it's beyond domsesh at this point. It can either be domshit or domfuck after that, you can understand the difference.
-LOL did you see that Shaco try and Deceive away?
--Yeahh, he just got DOMSESHED lol.
-I just raped this rogue
--No man, you domfucked him!!
-Yeah bro you're right
--Yeahh, he just got DOMSESHED lol.
-I just raped this rogue
--No man, you domfucked him!!
-Yeah bro you're right
by John F. Trinity April 06, 2012