beezer Share definition Flag northern irish slang usually used by spides or steeks, when describing something is cool, amazing or cracker. "aye mate dat corsa`s a fuckin beezer" beezer by nigel lai February 17, 2005 Words you can keep railfan mug chonk mug chud mug based mug 67 mug slime mug mogging mug chopped mug thot mug glazing mug huzz mug yams mug larp mug unc mug cracked mug simp mug baddie mug bop mug lolcow mug