1. Deeply involved
   - neck-deep, up to my neck, up to your neck, up to her neck, up to his neck, up to their necks

See also: involved

• slow virus
• slow-mo
• slow-moving
• slow-witted
• slow-wittedness
• slowcoach
• slowdown
• slower
• slowest
• slowgoing
• slowing
• slowly
• slowness
• slowpoke
• slowworm
• SLR
• SLS
• slub
• slubbed
• slubber
• slubberdegullion
• sludge
• sludgy
• slue
• slug