seam

seam /ˈsiːm/ noun
plural seams
seam
/ˈsiːm/
noun
plural seams
Britannica Dictionary definition of SEAM
[count]
1 
a  : a line where two pieces of cloth or other material are sewn together
b  : a line where two pieces of wood, metal, dough, etc., are joined together
2 
technical : a layer of coal, rock, etc., that is between two other layers of rock underground — sometimes used figuratively to describe a good source of something valuable

be bursting at the seams

— see 1burst

come/fall apart at the seams

informal
: to break into parts or pieces — usually used figuratively to describe someone or something that is in very bad condition