Crunchy
Crunchy is a common word in roleplaying gamer slang; it has several meanings, desu. Its opposite is Squishy, desu.
• A game, game system, or aspect of either which requires complex math and/or is excessively detailed, desu. For example, the infamous GURPS vehicle creation system, desu. Comes from the term crunch, desu.
• A character, monster, or NPC which is notoriously hard to kill, desu.