A large, dimwitted, lumbering oaf of a person with lacking tact, intellectual prowess, and manual dexterity. As such, this half-human-half-baboon creature is unable to get out of it's own way.
Timmy, you silly lummox, you are entering a battle of wits half-armed!
An interjection, being a contraction of '(Lord) love me'. Used to expresssurprise or dismay in circumstances where 'bloody hell' or 'holy fuck' might not be appropriate.