Related Clues:

• Covered with thick, icky liquid
• Hard to hold, in a way
• Vile, as a villain
• Like sludge
• Like snails' trails
• Covered with slippery stuff, say mud
• Glutinous
• I'm in a cunning, slippery state
• Like guck
• Like a slug's trail
• Like snakes, in many people's imaginations (but not really)
• Southern Englishman, say, is like a slug
• Sycophantic
• Repulsively obsequious
• Moist and slippery