You may be receiving oral pleasures from a lady (or man, whatever floats your boat), and at the point of climax the noise expelled by your willy while ejaculating is a big "BLAT", similar to the sound it would make if you jumped on a full tube of toothpaste.
1. a word used to confuse and otherwise annoy foreign exchange students from Slovakia. To confuse your own Slovakian, just tell them it can replace any noun.
1) Anoter one of many terms designating a type of fart. The "blat" is designated by an explosive blast of rectal gas. While the sound is ferocious, the smell is usually deadly. However the duration (of both the blat and the people standing around the blat-ter) is very brief (pun intended).
2) The type of fart typically associated with "Ocky" and "Clutcher" in the less-well-known comic series of the same name.
3) Designating one of the the two most obnoxious sounds of the tuba. In this context, the term is often spelled "blatt" and associated with "the other" obnoxious sound of the tuba, the "woop". Often the two sounds are grouped together (e.g. "blatting and wooping").