srsly is internet shorthand for seriously

short for seriously with the vowels excluded

'seriously' spelled without the vowels.
used by lazy people on the internet.

Used often in txt, as double tapping or t9 is really annoying

Srsly is an internet shorthand or slang for seriously. It is either written out of laziness, a complete inability to spell or type, or in a failed attempt to be amusing.

An abbreviation for "seriously".

taking vowels out of words doesn't always make the cool.