ershest 

( ur- shist) a suffix that is greater than -est the suffix that was previously known as top suffix to describe somethings pure awesome-ness. Infact, the suffix ershest is so powerful, it can not be matched by any other word and thus, has no synonyms.

rob's skate board was cool, rodney's board was cooler, and danny's board was the coolest, however my skate board is the coolershest!

ershest by baracktimus prime April 16, 2010

eshest 

sydney slang
meaning good - actually the best or most good u can get
reserved from majorly good things
for more on this word check out eshays

so eshest is to eshays as
sickest is to sick (meaning good)
also esh as shortened version of eshest

shes the eshest chick i ever saw

or

or esh bro (meaning sickest / best bro)

eshest by Esh Bro Timbo December 10, 2006