To Slow Up Meaning. The illness slowed him down. He or she is very sensitive and somewhat withdrawn.
Slow on the uptake. VERB PARTICLE The introduction of a new code of criminal procedure has also slowed up the system. The phrasal verb speed up formed by adding the adverb up to the verb speed is the opposite of slow down.
Requiring a long time.
We were expecting 30 people to come but half of. To cause compel or force someone or something to decrease in frequency intensity or activity. Slow-up definition a delay or retardation in progress or activity. Cause to slow down or get stuck.