Someone who is a noob (that is, has no will to learn). They generally spend their time queefing instead of learning. They could also be described as clueless or/and unmotivated
by jesuswozhere May 13, 2010
Get the lachlanmug. 
by HeyTherePeeps August 27, 2019
Get the lachlanmug. a kid who is really pasty, really short, has his pants hitched up to his armpits, and has his shirt tucked into his underware. he is a freak who stated year seven at the age of 10 and he has an iq of 180.
by L337 H4X0R March 17, 2003
Get the lachlanmug. 
Lachlan is a rectangle, he is seen in kindergarten books like 'the big mean rectangle man' (he is a paedophile). Lachlan plays a very gay game called division 2. He is a gamer and brings his mouse pad too school like a fucking idiot. At lunch he chases kids. Lachlan attempts at selling little kids genitals on the black market. Lachlan is actually featured on Mr. Maker as the big red rectangle.
by jozime September 13, 2020
Get the lachlanmug.