Top Definition
The group of fans of the Australian band 5 Seconds of Summer or 5SOS. This is actually a short form for the 5SOS Family, but is more commonly used to describe the fans. The band consists of Michael Clifford (guitar, backing vocals), Calum Hood (bass guitar, vocals), Ashton Irwin (drums, backing vocals) and Luke Hemmings (vocals, guitar).
Fan 1: Are you part of the 5SOS Fam?
Fan 2: Of course! I love them and their music.
by adedicated5SOSfammember December 29, 2013
Photos & Videos
short for 5sos family, fans of the Australian group 5 seconds of summer, that consists of

Calum Hood (bass)
Luke Hemmings (vocals,guitar)

Michael Clifford (guitar)
and Ashton Irwin (part time parent,part time kangaroo, part time drums)

Literally the most chill fandom on the world and we want it to stay that way

WE DO NOT SHIP ANY OF THE BOYS ROMANTICALLY AS MORE THAN A JOKE

THE MOST INSECURE PEOPLE ON THE PLANET
1: 5sosfam is all so insecure even though they are all perfect

2: We get it from Luke
by KyM January 31, 2015
The group of fans of the Australian band 5 Seconds of Summer or 5SOS. This is actually a short form for the 5SOS Family, but is more commonly used to describe the fans. The band consists of Michael Clifford (guitar, backing vocals), Calum Hood (bass guitar, vocals), Ashton Irwin (drums, backing vocals) and Luke Hemmings (vocals, guitar).
Fan 1: Are you part of the 5SOS Fam?
Fan 2: Of course! I love them and their music.
by adedicated5SOSfammember December 29, 2013
Crazy motherfuckers who will distroy you if you say anything about 5sos that they disagree with.The 5sos fam are not fans but a family...who will cut the shit out of you. :)
Ex.
Lexi: This is my favorite band.*points to picture*Im apart of the 5sos fam.
Tom: Eww boybands
*Slash*5sosfam5secondsofsummer5 seconds of summer5sosfamfamilyashton irwinMichael CliffordLuke HemmingsCalum hood
by Mrs.Collinsxxx March 14, 2016

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