The Mosquito Bloke, or more precisely receiving a Mosquito Bloke, would be the act of your sexual partner vomiting on your penis whilst receiving a blumpkin. Either by accident or calculatingly or consensually agreed by both parties before hand.
"Hey Luke, what did you get up to last night?........well it's a funny story, Naomi was giving me that long promised blumpkin
we had been talking about about for a while, however she had eaten a large portion of Mushroom Cordial
and Stilton Blobber
earlier on in the night so my cock made her gag and she spewed all over my manhood, it was an awesome Mosquito Bloke
, even though it was an accident! I'm gonna ask her if she'll do one on purpose tomorrow night"