a family of over dedicated fangirls/boys who would legit stab you if you say any irrelevant shit about any of the boys, the boys being michael clifford, luke hemmings, calum hood, and ashton irwin.
by michaelgctrash March 10, 2017
by 5sosFamZoneGirl November 19, 2016
The name of the Fandom for Aussie pop-rock band 5 Seconds Of Summer. Luke Hemmings, Calum Hood, Michael Clifford, Ashtom Irwin (youngest-oldest) Band was formed 2011, December. / 5SOS Gave this name 5SOSFam for their dedicated fans.
The 5SOS Fam is too big.
by nxrvana-rql April 12, 2015
A 5sos fangirl is an over obsessive fan of the rock band 5 seconds of summer. If someone insults the band or calls Calum Asian, she will tell them to take a left down the cliff and just tumble for a while.
by NightOfRaider May 02, 2018
fxcking...5sos.1dlooser is a TikToker who is a 1d and 5sos fan,his actual name is harry,he's under 14 y/o and is a larrie but not buzzing.
by Alicepayne June 12, 2021
The aussie band that consists of Calum Hood, Ashton Irwin, Luke Hemmings, and Michael clifford. They are also THe band that i have been a fan of for 3 years and i simply cry (sob) whenever i hear any of their songs. so uh yea.
5 seconds of summer (5sos) is my life and if you insult them i will find out where you live (just kidding, maybe.)
by 5sos since 2011 June 22, 2014
The band no one’s heard of unless your a fan of one direction or you were alive when 2014 was a thing.
POV: it’s 2014
Person 1: aye, have you heard of 5sos?
Person 2: who?
Person 1: she looks so perfect-
Person 2: wait….they made that?
Person 1: aye, have you heard of 5sos?
Person 2: who?
Person 1: she looks so perfect-
Person 2: wait….they made that?
by 5sos is me October 05, 2021