Pronunciation: [t͡ʃˈɒk ˈʌp] (IPA) 
The correct spelling of the phrase "chock up" is actually "chock-full". This phrase means completely full or packed to capacity. The "k" at the end of "chock" is pronounced because it represents the sound of the "k" in "back". The "o" in "chock" is pronounced like the "aw" in "saw". The word "up" is not technically part of the phrase and is often added erroneously. Proper pronunciation of "chock-full" would be /tʃɒk fʊl/.
Chock up is a phrasal verb that can have different interpretations based on the context in which it is used. It is commonly used in informal speech and has a couple of distinct meanings.
One meaning of "chock up" is to become emotional or upset, especially to the point where one has difficulty speaking due to tears or sadness. In this sense, it refers to a feeling of being overwhelmed by strong emotions that inhibits clear expression. For example, when watching a heartwarming movie, someone might say, "The ending always makes me chock up."
Another meaning of "chock up" is to fill or block a space completely or to congestion. It implies a state of being completely filled or obstructed. This could refer to physical objects, such as packing a suitcase so full that it is impossible to fit anything else in, or to a situation where a road is blocked due to heavy traffic. For instance, a person might say, "You've chocked up the closet with so many clothes that there's no space for anything else."
In summary, "chock up" is a versatile phrase that describes both the emotional overwhelm that restrains speech and the state of being filled or obstructed.
