kill

KILL  -  mark the current message for deletion, and read the next message

Usage:  KILL  

The KILL command combines two commands, DELETE and NEXT, that are often
  used one after the other in READ MODE.  DELETE marks messages as deleted,
  to be permanently removed when you give an EXPUNGE command or leave MM
  with BYE or EXIT.  NEXT is usually not typed because it is the default 
  command when you just press the RETURN key in READ MODE.

Example:
    MM>read 1:10	#start reading messages 1 to 10
    ..message 1..	#message 1 is displayed
    Read>de		#mark message 1 for deletion
    Read>		#RETURN key normally means NEXT
    ..message 2..	#message 2 is displayed
    Read>kill		#KILL instead of DELETE and NEXT
    ..message 3..	#message 3 is displayed

For more help, type "help" and one of these topics:
  delete   next   set default-read-command   expunge   message-handling