light of my life: (idiom) a person you love / the most special person in your life

turn (something) on: (phrasal verb) to activate something electric

turn (someone) on: (phrasal verb)to excite or become excited sexually

1. catch up
   Intransitive
   Meaning: get to the same point as someone else
   Example: I missed class on Friday.  Can I have the work so that I can catch up?

          catch up (with someone)
Intransitive
          Meaning: to update someone on the most recent information
          Example: Let’s grab a coffee and catch up some time this week.

Step 1: Fill the 5 gallon jug and then pour it into the 3 gallon jug. The 5 gallon jug has
2 gallons left.
Step 2: Now throw the 3 gallon water away. Pour the 2 gallons from the 5 gallon jug to the 3 gallon jug. So now the 3 gallon jug has just 2 gallons of water.
Step 3: Fill the 5 gallon jug again, and pour 1 gallon to the 3 gallon jug. What do u have left in the 5 gallon jug? 4 gallons of water!