Someone who can reliably be called on to give a woman orgasms, usually by giving cunnilingus, without the need for reciprocity, or comittment. They're kind of like a fwb that you can share with friends sometimes.
"Thanks again for sending over your blusher. I don't know how I would have made it through finals week otherwise."
"FWB is too complicated. Sometimes you just need a blusher."
"Sometimes I don't have time for sex, or I'm just too tired, but I stay horny af. My blusher doesn't dissappint."