snoopy today's strip

mental
{adj}
1 [only before noun] relating to the health or state of someone's mind

• mental illness
• mental health.

2 [only before noun] relating to the mind and thinking, or happening only in the mind:

• mental attitude.
• mental picture/image

3 to make a special effort to remember something:

• make a mental note

4 a difficulty in remembering something or in understanding something:

• mental block

5 (British English spoken informal)
a) to get very angry
b) to start behaving in an uncontrolled or excited way

• go mental
  

6 [not before noun] (British English informal) thinking or behaving in a way that seems crazy or strange:

• mentally = {adv}
• somebody must be mental