It's just Alex doing Alex things.
Something Alex does that is very basic (like his taxes.)
Alex is doing a Alex thing right now.
A little bitch who loves taking your food of the ground and will suck your dick for a cookie
play's league all day and doesn't smell very good
"Oh hey it's Alex. That bitch smell like fetta cheese or something."
A fucking madman; usually someone who would post inappropriate jokes on the main channel of a public school discord, get told to stop, but never gets banned because his jokes are actually funny. Legend is also an appropriate title, but not used as often.
Friend: Did you see what (Person) posted on Discord} last night?
Other Friend: How did he even think of that? He's such an Alex!