shoestring

shoestring /ˈʃuːˌstrɪŋ/ noun
plural shoestrings
shoestring
/ˈʃuːˌstrɪŋ/
noun
plural shoestrings
Britannica Dictionary definition of SHOESTRING
1 
[count] US : shoelace
2 
[singular] informal : a small amount of money — usually used in the phrase on a shoestring
— often used before another noun