The act of placing ones mouth around the head of a penis and blowing forcefully. There is no up or down or forward motion, just a firm, steady stream of breath being blown directly on to the rim of the penis head, aka the "flange".
Did you hear about Huffman? He gives the best Logan flange jobs ever!
A man with a penis the size of a thumb. A girl usually cries Logan green to a man when the poor girl cannot feel the sensation of sex as the penis is too small.
Omg Logan green. Just use your fingers that would be longer than dick thumb