Here's a selection of phrases you will hear in our games.
"Red Rover" - as in, "red rover, red rover, send joe right on over." This is our term for stupid wizard tactics involving tossing fireballs or other mass-damage spells into combat areas, disregarding the presence of party members. It started as a sort of code word to get people to get out of combat so the wizard could toss spells, but...well, lack of patience prevailed.
"Bigger Drizzt Syndrome" - is a play on the phrase, "bigger ...'richard'... syndrome." Similar to guys who need to demonstrate that they are cooler and tougher than others, this spawned from the plethora of two-sword wielding drow or other evil-turned-good cliche characters.
"Teched out", "Teching your character", and "Tech-tech-tech-tech" - reserved for players who have sooper kewl feat combos, huge bonuses to die rolls, and ultra-refined combinations of class features and/or magical items (especially when these things were loosely tied to a character concept, if at all). "Tech" was given to this concept because constructing characters in such a way was "technically" possible, but seemed about as imaginitive and original as playing a laboratory technician.
"off-brand", "generic", and "yellow-label" - most non-WotC d20 publishers that have not-yet proven themselves to be worth using in our games. It is not meant as an insult of inferior quality; rather it is a jab at the fact that there are SO MANY d20 publishers, that it takes something very good to be noticed and recognized as unique and worth money to buy. Otherwise, the non-WotC d20 shelf at the FLGS is merely full of a zillion books which all cover the same topics in 5 different ways. For example, in our games, source material comes from "Core" (WotC and Dragon magazines), "Scarred Lands", "AEG", "Kalamar", and "the other off-brand stuff."
"Munchkin Press" - books and/or publishers that obviously exist for the powergaming types. Sometimes it can apply to perfectly good books used in the wrong settings and games. "Swashbuckling Adventures" is certainly a great book, but fits in this catagory when someone wants to Tech-out their character in a standard game.