slow up

slow up (http://definr.com/slow up)

     v 1: become slow or slower; "Production slowed" [syn: slow, {slow
          down}, slack, slacken]
     2: cause to proceed more slowly; "The illness slowed him down"
        [syn: slow, slow down]
     3: lose velocity; move more slowly; "The car decelerated" [syn:
         decelerate, slow, slow down, retard] [ant: accelerate]