This refers to a womans vagina ladygarden, stenchtrench, with specific reference to a hairy examplegrowler, 100gBaccypouch; and used in conjuction with a red bush becomes rougemooge.
She had strawberry blonde hair but a Rouge Mooge lads!
I went up her moog like a ferret up a trouser leg.
Dave - Yo, Byron, look at that fat gobby cow over there!! Mouthing off about all that gold...
Alex - Fuck yeah Big Dave, what a Moog...
Dave - Damn Straight